I once sent someone a YouTube link and they were wondering why I sent them a link to an ad. It didn't even occur to me there would be an ad there because I was

I once sent someone a YouTube link and they were wondering why I sent them a link to an ad. It didn't even occur to me there would be an ad there because I was using FF and UBO, and obviously he wasn't. UBO just makes it so seamless that it is easy to forget.